What to expect in a high school?

I don't know what you like to do personally, but if you likes something, try to find a club or group of people that like that sort of thing too. I joined marching band my first year, and it gave me a whole new group of people that I enjoyed being around. Also it is still going to be the same people you knew from middle school(unless you moved), so you should still have friends from there. As long as you don't act like a dumbass in your classes, freshman classes are pretty easy, but you still need to study, because you have to keep a good grade in classes to stay in them after first semester. If you are worried about being pineappleed with, find a group of friends to be around most of the time, and don't act like you are better than anyone. As long as the upperclassmen at your school are not complete plantains, you shouldn't have a problem with them, just don't act like a dumbass. Lastly, don't act like a dumbass.